Valve reconditioning chuck



Oct' 9, 1951 F. G. LIVINGSTON ETAL 2,570,825

VALVE RECONDITIONING CHUCK Filed March 27, 1950 Patented Oct. 9,` 1951UNITED "STATE S PATENT GFF 2,570,825 IC E VALVE RECONDITIONING CHUCKFrancis G. Livingston and Oren B. Harmes, Algona, Iowa, assignors toLivingston Tool Co.,

Algona,

Iowa., a partnership composed of 4 Claims.

This invention relates to valve reconditioning tools.

An object of our invention is to provide a tool for reconditioningvalves which will provide the valves with a new valve face having theexact inclination desired for co-operation with a valve seat of giveninclination.

Another object is to provide a valve reconditioning tool capable ofutilizing a sheet abrasive and having provision therein for quick,simple and easy changing of such sheets.

Another object is to provide a tool for reconditioning valves which willform a new valve face of the exact inclination desired with a minimum ofloss of the body material of the valve.

A further object is to provide a novel and improved valve reconditioningtool of cheap and simple construction capable of quick and easyoperation by unskilled labor.

These and other objects and advantages of our invention will more fullyappear from the following description made in connection with theaccompanying drawings, wherein like reference characters refer tosimilar parts throughout the several views and, in which:

Fig. 1 is a side elevational view of the tool be- `'ing used inconjunction with a vise;

Fig. 2 is a vertical sectional view of one embodiment of our invention;

Fig. 3 is a top plan view of the tool with a portion broken away;

Fig. 4 is a side elevational view of the adapter;

Fig. 5 is a bottom elevational view of the adapter;

Fig. 6 is a sectional view along line 6--6 of Fig. 2;

Fig. 7 is a bottom elevational view of a valve being reconditioned,showing the bore of the chuck in broken lines;

Fig. 8 is a plan view of an abrasive sheet formed for use in conjunctionwith our tool;

Fig. 9 is a side elevational view of a shank,

ysurface III which is annularlv arranged about the recess and extendsoutwardly and upwardly toward said upper edge. Thisreference surface I4is formed at any desired angle relative to the bore of the recess I 3.

A retaining nut I5 is provided with internal threads I6 adapted toco-operate with the vthreaded external portion I2 of the chuck I0 so asto secure the retaining nut I5 to the chuck. The retaining nut I5 isprovided with an overhanging lip I5a which extends downwardly andannularly in overlying relation to the upper portion of the referencesurface I4.

The bore of the recess i3 is of such dimensions as to accommodate thebutterfly structure I'I commonly found on the lower portion of the valveindicated generally as I8. The bevelled face I9 of the valve I8 which isto be reconditioned is best shown in Fig. 2. 'Many valves, andespecially those found in homogenizers, have an upstanding generallycylindrical portion 20 adjacent their upper end. This cylindricalportion 20 as shown in Fig. 6 is normally provided with a pair ofattened sides 2|. To enable the operator to cause the valve I8 to turnrelative to the 'reference surface I4 we have providedY an adapter 22which, as best shown in Figs. 5 and 6, has its lower portion 23 formedto accommodate in a snug t the upstanding portion 2U and has its upperportion formed to receive the hexagonally shaped lower end of atorque-applying shank 24 of a speed wrench 25.

Fig. 8 shows an abrasive sheet 26 formed of such shape and dimensions soas to smoothly cover the reference surface I4 of a given inclinationwhen annularly arranged relative thereto. These abrasive sheets 26, ofcourse, must be formed of a diiferent size and shape for each referencesurface having a different angle of inclination. The pattern for suchabrasive sheetsv 2B is attained by cutting a cone of the desiredangularity and flattening the same upon a flat surface.

Fig. 9 shows a shank 2I which is adapted on its upper end 2R to beaccommodated by a powerdriven drill (not showni and at its lower end 29to receive thereon the adapter 22.

In operation. the retaining nut I5 is rst loosened with the fingers orremoved entirely and an abrasive sheet 25 of the necessary shape anddimensions is annularlv arranged and applied to the reference surface I4in smooth relation thereto. This is best accomplished by causing theends of the abrasive sheet 26 to be brought together in registeringrelation. If the proper abrasive sheet 25 is used with resnect to theangle of inclination of the chuck I I) which is being used, the abrasivesheet will exactly fit .the reference surface I4 of the chuck IIJwithout overlap. It is a simple operation to tighten the retaining nutI5 by turning it relative to the chuck I8 whereunon the threads I6 willengage the threaded portion I2 of the chuck Ill and cause the retainingnut I5 to move downwardly relative to the chuck I9 until the lip I5aengages the upper end of the abrasive sheet 28. When theI retaining nutI5 has been tightened snugly, this lip I5a will clamp the abrasive sheet23 securely against the reference surface Ill to preclude it fromturning relative thereto. This operation results in preso that thebutterfly structure I 'If normally found:

along its lower portion willxt. within the. walls of the bore of therecess I3 and register therewith; The recess I 3 will thus providevcentering-'and a bearing for the valve I 2 when itisturnedrela` tive tothe chuck Il) and the reference surface I4 With its abrasive sheet 25.-T`o facilitate` the turning of the valve the adapter 22 isapplied-to?V74 the upstanding portion 128 of the valve IB as isbestshowninJigs...1.,and=2 and the speedwrench 25. issecuredto-.theuppen portion ofthe adapter 22... By.v causing thespeedWrench to turnthe operator.. willV cause4 the valve I 8v tol turn.relative to the abrasive surface provided if the chuck I0 isheldimmovableasin a vise, as shown in Fig; 1. By repeated. turning. ofthe valve. Iin this manner, a new; valve. face.- I 9 having-.the exactdesired inclination-will be formed., If. the oldr valve. face is-badlyWorn, .the valvemaybe turned rapidly loyutilizing the adapterr22 inconjunctionwith the shanle-anda power-driven drill-(not shown).

Inv they event thaty a new. abrasive sheet 25.. is needed it-can`befreadily seenfthatfit is-a quick andz easymatter to loosen theretainingfnut`V I5, removeftheoldand- Worn abrasive sheet and.- insert-anew abrasive sheet to replace it. Bymerely tightening the retaining nutVI Enthe tool is againl immediatelyready.Y for reconditioning operation;`

It 'should be notedthat-our invention provides a tool for reconditioningvalves which` will form a newfvalveface. having the exact inclinationdesired for cfa-operation with a valve'seat ofn given inclination.Thisfis accomplished by simply selectinga chuck Iihwhichhas-a referencesurface lilh of the desired `inclinationl and: performing.. theoperation described above.

Itrshouldralso'be noted that our'tool'iscapable offutilizinga sheetabrasivel in contrast-to. the ccrwentionarl meansR of"A grindingV.valves` which utlizeselapping compoundf. Ourtool: eliminates the mussf:and othendisadvantages involvedVY in vsingfa latir-infr compound: andprovides a nuick, simule and easv methnd nf changing the4 abrasivesheets' whichF aref-used instead.

One' of the other advantages of our tool is that new valve face can beformedfon aworn valve which will have the exact desired inclinationwithout employing specially designed cutters. Such' cutters whenused,although they provide a ne"7 valve faceof the desired inclination.neces- "itete the removal' and loss off1 substantial portion-ff'the'bodvof the valve itself; l Our tool nrovides'fa new valve faceof the exact inclination desired-with a very minimum of loss of the bodymaterial ofthe' valve. since all that is required is thattlc'eoperatorcease to revolve the valve I8 as soon as'the' newvalve face hasbeen formed.

Anotheradvantage of our` tool is that it is of cheap andv simpleconstruction and can be used in'a quick and easy manner by even the mostunskilled laborer. Because of the centering which isprovided for thevalve I8 by the bore of the recessV I 3 itis impossible for the operatort0 form a valve' seat which does not conform to the requiredspecifications.

It will,`of course, be understood that various changes may be made inthe form, details, arrangement andA proportions of the various partszvithout departing from the scope of our invenlon.

What We claim. is:

1. A valve reconditioning tool comprising a. body having an annularrecess formed therein of dimensions to snugly receive the lower portionof thevalve. totbe reconditioned in order to providecenteringand arbearing for said valve, said body having afrusto-conical supportingsurface annular-ly arranged around said recess and adjacent thekouterend thereof for smoothly receiving an abrasive sheet thereon, andclamping means associated-With said body for engaging the upper1 end ofsaid abrasive sheet to smoothly clamp said sheet against said supportingsurface.

2A 'valveA reconditioning tool.. comprising a body having an annularrecess formed therein of. dimensions to snugly receive thelowerportionof., the valve.V to be reconditioned in ord'er., to., pro..-Vide-center-ing and a. bearingfor. said. valve,.said body having asupporting surface. annularlyar.- ranged around saidrecess,andadjacenttheouter end-thereof, for` smoothly4receivingamabrasive sheet thereon, saidJbOdy. havingan.. externallythreadedportion adjacent saidzsuporting. surface, and an internallythreaded retainingfnut adaptedtoccoperate with said threadedfportionofsaidrbody-to secure anabrasivesheetin smooth overlying relation withsaidfsupporting.,surface and ilxedvrelativethereto..

3. A valvereconditioning ltool'comprising a Vbody having anannulanrecessfformed therein of dimensionsto snugly. receivetheflowerportion of the valve to be reconditioned-to provide. cen.- tering and abearingfor saidvalve,- said body-havingV a supporting surface-annularlyarranged around said recessand adjacentthe-outer end thereofffor:smoothly receivingy antabrasive sheet thereon, and clamping meansassociated1^ with said body for engaginggftheyupper; edgeof.. theabrasive.Y sheet tosmoothly clamp -the same against said supportingsur-face, -saidfclamping meansr including a lip member overhangingrf theupper edge of said abrasive-sheet tov effectively clamp theL abrasivesheetsmoothly againstysaid supporting surface.

4; A'vallve 'reconditioning tool; comprising a body;v havinganfannular,` recessf'formed: tlilerein of dimensions to snugly receivethe lower portion-of the valve to'. be reconditionedfto: providecentering and a bearing for said valve, said body havingra`frustoconical reference surface annularlyf arrangedaround'said.frecesszandadjacent thei-outer end thereof, a flat flexibleabrasiveA sheetiformed to` a shape andv to dimensions to overlief saidfrusto-conioali reference surface when annularly arranged' relativethereto, andY clamping means associated'with said bodyfor engaging theupper end of said abrasive sheet to. smoothly clamp said sheet againstsaid reference surface.-

FRANCIS G. LIVINGSTON; OREN B. HARMES;

REFERENCES CITED The. following references` are ofn recordinthe file. ofthis patent;

